Die Meldung beim Chrome z.B. ist "Mixed Content: The page at 'https://www.eichner-org.de/index.php/de/shop' was loaded over HTTPS, but requested an insecure image 'http://www.eichner-org.de/index.php'. This content should also be served over HTTPS."

this answer is not very helpful. As I said, if I deactivate the module Jshopping Categories all is fine. So why this is a matter of the template or the module. For me it seems it is coming from the category view module.

It would be good to get some more information about it. Developer of the template says it is the module, developer of the module says it is the template. Please help to figure out, what is the problem here.